Arduino Potentiometer Controled Relay Module

//
//
//
//          Arduino Potentiometer Controled Relay Module
//          by learnelectronics
//          4/6/2019
//          www.youtube.com/c/learnelectronics
//          email:[email protected]
//
//
//








#include <Wire.h>                                   //I2C LIBRARY FOR OLED
#include <Adafruit_GFX.h>                           //ADAFRUIT GRAPHICS LIBRARY
#include <Adafruit_SSD1306.h>                       //ADAFRUIT OLED DRIVER LIBRARY

int potRead = 0;                                    //INITIALIZE VARIABLE FOR POTENTIOMETER


#define OLED_RESET 4                                //REQUIRED BY SSD1306 LIBRARY

Adafruit_SSD1306 display(OLED_RESET);               //DEFINE THE OLED AS display

void setup()   {
  Serial.begin(9600);                               //SERIAL COMMS FOR DEBUGGING
  pinMode(A0,INPUT);                                //DEFINE A0 AS AN INPUT
  pinMode(2,OUTPUT);                                //DEFINE D2 AS AN OUTPUT for relay 1
  pinMode(3,OUTPUT);                                //DEFINE D3 AS AN OUTPUT for relay 2
  pinMode(5,OUTPUT);                                //DEFINE D5 AS AN OUTPUT for relay 3 (cant use D4 - in use by OLED)
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);        //START UP THE OLED
  display.display();                                //SHOW BUFFER
  display.clearDisplay();                           //CLEAR BUFFER





}


void loop() {

  potRead = analogRead(A0);                         //READ THE POTENTIOMETER @ A0

  display.clearDisplay();                           //CLEAR THE DISPLAY
  display.setTextSize(1);                           //SETUP OLED WITH TEXT SIZE OF 1
  display.setTextColor(WHITE);                      //SETUP OLED WITH COLOR WHITE
  display.setCursor(0,0);                           //SETUP OLED WITH CURSOR IN UPPER LEFT
  display.print("Analog Val: ");                    //PRINT HEADING TO OLED BUFFER
  display.println(potRead);                         //PRINT VALUE TO OLED BUFFER
  display.println("------------");                  //PRINT A LINE TO OLED BUFFER
  display.println("");                              //PRINT BLANK LINE TO OLED BUFFER

      if (potRead > 2 && potRead <334)              //CHECK IF SYSTEM IS ON AND IN POSITION 1
      {
      digitalWrite(2,HIGH);                         //CLOSE RELAY 1
      digitalWrite(3,LOW);                          //OPEN RELAY 2
      digitalWrite(5,LOW);                          //OPEN RELAY 3
      display.setTextSize(2);                       //SET LARGE TEXT ON OLED
      display.println("Heat ON");                   //PRINT SYSTEM STATUS TO OLED BUFFER
      }
      else if (potRead > 333 && potRead <667)       //CHECK IF SYSTEM IS IN POSITION 2
      {
      digitalWrite(3,HIGH);                         //CLOSE RELAY 2(ON)
      digitalWrite(2,LOW);                          //OPEN RELAY 1(OFF)
      digitalWrite(5,LOW);                          //OPEN RELAY 3(OFF)
      display.setTextSize(2);                       //SET LARGE TEXT ON OLED
      display.println("Cool ON");                   //PRINT SYSTEM STATUS TO OLED BUFFER
      }
      else if (potRead > 666)                       //CHECK IF SYSTEM IS IN POSTION 3
      {
      digitalWrite(5,HIGH);                         //CLOSE RELAY 3
      digitalWrite(2,LOW);                          //OPEN RELAY 1
      digitalWrite(3,LOW);                          //OPEN RELAY 2
      display.setTextSize(2);                       //SET LARGE TEXT ON OLED
      display.println("Fan ON");                    //PRINT SYSTEM STATUS TO OLED BUFFER
      }
      else                                          IF SYSTEM IS OFF
      {
        digitalWrite(2,LOW);                        //OPEN RELAY 1
        digitalWrite(3,LOW);                        //OPEN RELAY 2
        digitalWrite(5,LOW);                        //OPEN RELAY 3
        display.setTextSize(2);                     //SET LARGE TEXT ON OLED
        display.println("All OFF");                 //PRINT SYSTEM STATUS TO OLED BUFFER
      }



  display.display();                                //SHOW WHATS IN THE OLED BUFFER
  delay(100);                                       //WAIT 100mS
  display.clearDisplay();                           //CLEAR THE DISPLAY



}